Cartea "Olimpiada Jocurilor Rationale" de Nicolae Oprisiu. Aceasta carte este o carte de logica si matematica recreationala. Cartea este de aceeasi natura ca si cartea "The Moscow Puzzles" de Boris A. Kordemsky.
This is a Romanian recreational math and logic book. The book is similar in nature to "The Moscow Puzzles" by Boris A. Kordemsky.